Clark Johnson, 94, is helping pioneer a technique can store more than 40,000 bits in each 10-square-micrometer pixel of a photograph, or 4.6 terabits in a 10.16 centimeter by 12.7 cm plate. That’s more than 300 movies’ worth of data stored in a single picture. Team members say the technique is incorruptible: It is immune to moisture, solar flares, cosmic rays, and other kinds of radiation.